Daniel bennett



- (No Model.)

D. BENNETT.

` LAMP.

Patented Apr. 18, 41382.

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N. PETERS. Pham-Limugmphen wnfmngam nc.

UNrTnD Sterns PATENT OFFICEev DANIEL BENNETT, OF BALDWIN TOWNSHIP, ALLEGHENY COUNTY, PA.

LAMP.

SPECIFICATION forming part of Letters Patent N0. 256,624, dated April 18, 1882.

Application tiled January 20, 1882. (No model.)

To all whom 'Lima/y concern Be it known that I, DANIEL BENNETT, residing in Baldwin township, Carrick I. O., county of Allegheny, State of Pennsylvania,A have invented or discovered a new an d useful Improvement in Lamps; and I do hereby declare the following` to be a full, clear,concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this speciiication, in which-like letters indicating like parts- Figure 1 is a vertical sectional view of my ilnproved lamp; and Fig. 2 is a perspective view ot' the parts separated, illustrative of the means employed for uniting them to form the lamp.

Myinvention relates to certainimprovements in glass lamps and it consists in a certain form or construction of the threaded fastening device, whercby theseparateparts may beunited, and also in the combination therewith of a new and improved form of drainagecup, formed on the stem of the lamp, as hereinafter described and claimed.

In the drawings, A represents the bowl or fount, B the stem, and G the foot, ot' a glass lamp. In the base or under side of the bowl is formed, in the process of making the bowl, a depressed cylindrical socket, a, and on the side walls of such socket are formed two or more inclines or short sections ofscrew-threads, a a. I have shown three such sections, and this number is preferred, though two or more will aii'ord good results. These thread sections or inclines are arranged at about equal distances apart, and are comparatively short, so

. as not to make a' continuous bearing entirely around the wall. They may be formed while the glass is plastic by means of expansible formers, having a grooved exterior surface, the counterpart of that to be given to the wall of the socket. Such formers, being inserted into the socket cavity, are forced apart or expanded radially, and by pressure thus imparted while the bowl is held exteriorly by the mold or equivalent device the desired form is given to the socket-wall. By contracting the formers when the desired result is accomplished they may be withdrawn.

The stem B is formed with a pin or plug, b,

threadsections ain the'socketor female-screw this difficulty is obviated, and a glass connection ispsecured which is strong and otherwise desirable. By thisA meansthe unsightly metallic connections usually employed in lamps made in separate parts are avoided, the connecting parts being formed entirely of glass, and at the same time the parts are separable when it may be desired to disconnect them. The same features of construction may be employed for uniting the stem and foot, a socket,

e, heilig formed in the lower end of the stem,

having part threads e on its inner side walls, substantially as described with reference to socket a. A threaded plu g or pin, c e', is also formed on the foot, adapted to screw into socket e, the'threads c bearing upon the spirally-inclined thread-sections e,as before described.

Instead of making the stem and foot in separate parts, they may, if preferred, be made in one piece by pressing or otherwise, as common-ly practiced in the art.

Upon the upper end of the glass stem, and integral therewith, is formed a dish-shaped ange or cup, D, the hollow clot' which is on the upper side immediately under the bowl when the parts are united, as illustrated in Fig. 1. This cup notonly gathers the oil which drips or iiows downward over the surface of the bowl, but it also partially covers and conceals the joint-connection between the stem and bowl, and thus hides defects, which may occur in tting these parts. It also forms a convenient shoulder or rest for the hand and shields it from the bowl, which is usually covered more or less with oil. By making this /dripcup of glass, integral with the stem, I Y

avoid the expense and disfigurement incident to connecting these parts with cement or otherwise, as heretofore practiced, and also the liability' of their becoming loose and shaky.

By making the lamp in separable parts such parts can be made of glass of different colors, thus making it more ornamental; also., if one part be broken it can be replaced with little loss.

It' desired, the f'onnt or bowl A, having the threaded socket a a therein, as described, may be used to advantage in chandeliers and other stationary lamp-holding devices, the socket, with its threadsections a, being employed to secure the fount by screwing onto a threaded plug, substantially as above described.

I claim herein as my inventionl. A glass-lamp fount, A, having a socket, a, on its under side, with separate inclines or thread-sections a', ot' glass, formed on the inside wall of such socket, substantially as set forth.

2. A glass lamp having in the base of its bowl a socket, a, with separate incliues or threadsections a', of glass, on the side wall of the socket, and a glass stem,B, with threaded 25 glass piu b, adapted to screw into the socket a, substantially as set forth.

3. A glass lamp having a separable bowl, ste1u,and foot formed of glass,theconnections between such parts being formed of threaded 3o glass pins and sockets, the latter having separate inelines or thread-sections on their side walls, substantially as set forth.

4. A lamp having a separable glass bowl and stem, the connection being formed of 35 threaded pi'n b and socket a, with part threads a thereon, and with a drip-cup, formed of glass, integral with and on the upper end of the stem, substantially as and for the purposes set forth.

In testimony whereof I have hereunto set 4o my hand.

DANIEL BENNETT,

Witnesses:

R. H. WHrr'rLnsEY, L". L. PARKER. 

